diff --git a/menus/marathon_start.gd b/menus/marathon_start.gd
index c9d677a..3b414cc 100644
--- a/menus/marathon_start.gd
+++ b/menus/marathon_start.gd
@@ -1,6 +1,9 @@
 extends Control
 
 
+const DISABLED_COLOR := Color(0xb0b0b0ff)
+
+
 export var first_level: PackedScene
 
 
@@ -29,6 +32,9 @@ func _input(event: InputEvent) -> void:
 
 func _set_difficulty(difficulty: int) -> void:
 	Game.difficulty = difficulty
+	for b in difficulty_buttons:
+		b.get_parent().modulate = DISABLED_COLOR
+	difficulty_buttons[difficulty].get_parent().modulate = Color.white
 
 
 func _on_DifficultySelect_focus_entered() -> void: